The Prospects for Telomerase Gene Therapy as a Treatment for Heart Disease

Telomerase gene therapy is considered in some quarters to be a viable treatment for aging. Telomeres are the caps of repeated DNA sequences at the ends of chromosomes. They are an important part of the mechanism limiting the number of times that somatic cells in the body can divide, the Hayflick limit. A little telomere length is lost with each cell division, and short telomeres trigger cellular senescence or programmed cell death, halting replication. Stem cell populations use telomerase to lengthen their telomeres and thus self-renew to provide a continual supply of new somatic daughter cells with long telomeres to replace those lost to the Hayflick limit. Average telomere length is reduced over the course of aging because stem cell function declines. This division between a few privileged stem cells and the vast majority of limited somatic cells is the way in which higher forms of life have evolved to reduce the risk of cancer. Somatic cells largely do not last long enough to develop mutational damage sufficient to become cancerous. When cancer does occur, most cancer lineages use expression of telomerase in order to lengthen their telomeres, allowing for unfettered replication. This biochemistry of cancer is the primary reason for caution in the matter of the clinical application of telomerase gene therapies in human medicine. While in mice cancer incidence is actually reduced by telomerase upregulation, possibly because immune system activity is improved to the po...
Source: Fight Aging! - Category: Research Authors: Tags: Medicine, Biotech, Research Source Type: blogs

Related Links:

Publication date: Available online 6 April 2020Source: Indian Heart JournalAuthor(s): Samit Ghosal, Binayak Sinha, Jignesh Ved, Mansij Biswas
Source: Indian Heart Journal - Category: Cardiology Source Type: research
Publication date: Available online 6 April 2020Source: Canadian Journal of CardiologyAuthor(s): Mohammad I. Zia, Venkat Ramanan, Idan Roifman, Kim A. Connelly, Graham A. Wright, Nilesh R. Ghugre
Source: Canadian Journal of Cardiology - Category: Cardiology Source Type: research
Purpose of review Hyperlipidemia, hypertension, diabetes and related metabolic disorders increase the risk for cardiovascular disease (CVD). Despite significant progress in the identification of key mechanisms and genetic polymorphisms linked to various CVDs, the rates of CVDs continue to escalate, underscoring the need to evaluate additional mechanisms for more effective therapies. Environment and lifestyle changes can alter epigenetic mechanisms mediated by histone modifications and long noncoding RNAs (lncRNAs) which play important roles in gene regulation. The review summarizes recent findings on the role of epigenet...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: MOLECULAR GENETICS: Edited by Ali J. Marian Source Type: research
Purpose of review This review highlights recent progress in applying genome editing to the study and treatment of cardiovascular disease (CVD). Recent findings Recent work has shown that genome editing can be used to determine the pathogenicity of variants of unknown significance in patient-derived induced pluripotent stem cells. These cells can also be used to test therapeutic genome editing approaches in a personalized manner. Somatic genome editing holds great promise for the treatment of CVD, and important proof of concept experiments have already been performed in animal models. Here we briefly review recent prog...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: MOLECULAR GENETICS: Edited by Ali J. Marian Source Type: research
Purpose of review Genetic variance on blood pressure was shown about 100 years ago; a Mendelian inheritance was initially presumed. Platt and Pickering conducted a lively debate, whether blood pressure was inherited in a Mendelian fashion or whether the condition was polygenic. Genetic-hypertension research has appropriately followed both pathways. Recent findings Genome-wide association studies, Pickering model, have identified more than 500 blood-pressure loci, the targets of which are waiting to be evaluated. Then, come the ‘dark-horses’ of hypertension, namely ‘secondary’ causes. These cond...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: MOLECULAR GENETICS: Edited by Ali J. Marian Source Type: research
No abstract available
Source: Current Opinion in Cardiology - Category: Cardiology Tags: CARDIAC FAILURE: Edited by Rebecca Cogswell and Gene Kim Source Type: research
Purpose of review To review the shared pathology of atrial fibrillation and heart failure with preserved ejection fraction (HFpEF) and the prognostic, diagnostic, and treatment challenges incurred by the co-occurrence of these increasingly prevalent diseases. Recent findings Multiple risk factors and mechanisms have been proposed as potentially linking atrial fibrillation and HFpEF, with systemic inflammation more recently being invoked. Nonvitamin K oral anticoagulants, left atrial appendage occlusion devices, and catheter ablation have emerged as alternative treatment options. Other novel pharmacological agents, suc...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: CARDIAC FAILURE: Edited by Rebecca Cogswell and Gene Kim Source Type: research
Purpose of review Atrial arrhythmias are common among individuals with heart failure with a reduced ejection fraction (HFrEF). This review describes management options for these arrhythmias and discusses emerging clinical data supporting catheter ablation. Recent findings Several recent clinical trials indicate that catheter ablation is superior to pharmacologic therapy for management of symptomatic atrial fibrillation in the setting of HFrEF. Restoration and maintenance of sinus rhythm appears to have the greatest benefit with regard to ejection fraction improvement among individuals with a nonischemic heart failure ...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: CARDIAC FAILURE: Edited by Rebecca Cogswell and Gene Kim Source Type: research
Purpose of review Atrial arrhythmias commonly occur in patients with advanced heart failure with reduced ejection fraction (HFrEF) who require left ventricular assist devices (LVADs) implantation. This review summarizes the current literature regarding the incidence, prevalence, and predictors of atrial arrhythmias in LVAD patients and its impact on the clinical outcomes. Moreover, we review the mechanisms and management strategies of atrial arrhythmias in this population. Recent findings Atrial arrhythmias including atrial fibrillation, atrial flutter, and atrial tachycardia are highly prevalent in patients with adva...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: CARDIAC FAILURE: Edited by Rebecca Cogswell and Gene Kim Source Type: research
Purpose of review To provide a framework for approaching ventricular arrhythmias in the setting of cardiomyopathy, outline the latest evidence-based recommendations for catheter ablation and device therapy, and discuss novel treatment strategies. Recent findings Risk stratification of ventricular arrhythmias in systolic heart failure has evolved, with an increasing role for cardiac magnetic resonance imaging to identify underlying substrate and scar burden. Medical therapy for heart failure has greatly improved, and the role of primary prevention defibrillators in nonischemic cardiomyopathy has become more ambiguous. ...
Source: Current Opinion in Cardiology - Category: Cardiology Tags: CARDIAC FAILURE: Edited by Rebecca Cogswell and Gene Kim Source Type: research
More News: Adenoviruses | Biochemistry | Biotechnology | Cancer | Cancer & Oncology | Cardiology | Cardiovascular | Clinical Trials | Congestive Heart Failure | Diabetes | Diabetes Mellitus | Eating Disorders & Weight Management | Endocrinology | Epidemiology | Gene Therapy | Genetics | Heart | Heart Attack | Heart Disease | Heart Failure | Hypertension | Medical Tourism | Obesity | Research | Scotland Health | Smokers | Stem Cell Therapy | Stem Cells | Study | Women